Perhaps you should try some spelling variations:
thu sach » tu sach, thuat sach, thuoc sach
hai chau » lai chau, hat chau, mai chau
thu sac » thu san, thu xac, thu dac
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
ma hanh » va hanh, da hanh, na hanh
ha chau » hat chau, a chau, lai chau
cac co » cac cong

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((thu sac) or (thu sach)) ky nang xa hoi. hieu va cac co ma hanh ((hai chau) OR (ha chau)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((thu sac) OR (thu sach)) ky nang xa hoi. hieu va cac co ma hanh ((hai chau) OR (ha chau)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((thu sac) or (thu sach)) ky nang xa hoi. hieu va cac co ma hanh ((hai chau) OR (ha chau)) tre*".