Perhaps you should try some spelling variations:
thu sach » thuat sach, thuoc sach, thu hoach
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
tu sach » su sach, te sach, tu cach
nang xa » nang x, lang xa, nang ma
thuc va » thuc vat, thuc dan, thuc day
y nang » ky nang, ly nang, v nang
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va

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 (thu sach)) y nang xa hoi. lieu va cam ((luc va) or (thuc va)) hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thu sach)) y nang xa hoi. lieu va cam ((luc va) OR (thuc va)) hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (thu sach)) y nang xa hoi. lieu va cam ((luc va) or (thuc va)) hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (thu sach)) y nang xa hoi. lieu va cam ((luc va) or (thuc va)) hanh lai chau tre*.