Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuoc sinh
thuat sach » thuat lanh, thuat san
hanh lai » hanh lam, hanh tai, thanh lap
chau tre » chay tren, chau tho, cho tre
nang xa » nang x, lang xa, nang ma
va hanh » van hanh, va thanh, va danh
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
ve cam » ve cham, ve cac, ve cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thuoc sach) or (thuat sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thuoc sach) OR (thuat sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thuoc sach) or (thuat sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre".
• Adding a wildcard symbol may retrieve word variants: ((thuoc sach) or (thuat sach)) ky nang xa hoi. hieu ((ve cam) OR (va cam)) tuc va hanh lai chau tre*.