Perhaps you should try some spelling variations:
hoc sach » hoc sinh, hoc cac, hoc anh
hanh dao » lanh dao, thanh dat, thanh dam
cham xuc » cam xuc, chat xuc, cham soc
tu sach » thu sach, su sach, te sach
dao cua » dai cua, day cua, dan cua
va hanh » van hanh, va thanh, va danh
va cham » va chat, va tham
hieu va » lieu va, hieu qua
van hoe » van hoa, van hoc, van hieu
van hoi » van hoa, van hoc, van loi
ky lang » ky nang, ky dang, ky tang
xuc va » duc va, tuc va, luc va
cua tu » cua tuc, cua su, cua cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu sach) or (hoc sach)) ky lang ((van hoi) OR (van hoe)). hieu va cham xuc va hanh dao cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (hoc sach)) ky lang ((van hoi) OR (van hoe)). hieu va cham xuc va hanh dao cua tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (hoc sach)) ky lang ((van hoi) OR (van hoe)). hieu va cham xuc va hanh dao cua tu".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (hoc sach)) ky lang ((van hoi) OR (van hoe)). hieu va cham xuc va hanh dao cua tu*.