Perhaps you should try some spelling variations:
thanh cac » thanh bac, thanh ca, tranh cac
hoc sach » hoc sinh, hoc cac, hoc anh
hanh cac » hang cac, hanh cat, nhanh cay
nang mai » nang ma, nang tai, lang mai
hieu van » hieu va, thien van, lieu va
nam luc » nang luc, nhan luc, nam thuc
luc ban » duc ban, cuc ban, luc bat
mai hoi » mai khoi, dai hoi, lai hoi
co sach » bo sach, cuon sach
y nang » ky nang, ly nang, v nang
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (co sach)) y nang mai hoi. hieu van nam luc ban ((thanh cac) OR (hanh cac)) cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (co sach)) y nang mai hoi. hieu van nam luc ban ((thanh cac) OR (hanh cac)) cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc sach) or (co sach)) y nang mai hoi. hieu van nam luc ban ((thanh cac) OR (hanh cac)) cua te".
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (co sach)) y nang mai hoi. hieu van nam luc ban ((thanh cac) OR (hanh cac)) cua te*.