Perhaps you should try some spelling variations:
kham chua » kham pha
pham chuc » pham duc, pham huu, pham huy
nang tai » hang tai, tang tai, sang tai
hanh vai » hanh vi, hanh va, hanh tai
lang mai » lang dai, lang hai, lang man
sach thu » sach thue, sach thieu, sach tham
so sach » so sanh, bo sach, co sach
vai cua » dai cua, hai cua, lai cua
va hanh » van hanh, va thanh, va danh
hieu ve » hieu va, hieu van
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: so sach thu ((nang tai) or (lang mai)) hoi. hieu ve ((pham chuc) or (kham chua)) va hanh vai cua tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach thu ((nang tai) OR (lang mai)) hoi. hieu ve ((pham chuc) OR (kham chua)) va hanh vai cua tu.
• Adding a wildcard symbol may retrieve word variants: so sach thu ((nang tai) or (lang mai)) hoi. hieu ve ((pham chuc) or (kham chua)) va hanh vai cua tu*.