Perhaps you should try some spelling variations:
hanh tai » thanh tai, hang tai, han tai
nang tai » hang tai, tang tai, sang tai
cham duc » cham soc, pham duy, phan duc
su sach » so sach
tai duc » tai cuc, mai duc, tai du
va hanh » van hanh, va thanh, va danh
hieu va » lieu va, hieu qua
tai hoi » tai khoi, dai hoi, tai hai
vu sach » vu bach, vu khach
duc tre » duoc tren, duc tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((su sach) or (vu sach)) ky nang tai hoi. hieu va ((cham duc) or (pham duc)) va hanh tai duc tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) ky nang tai hoi. hieu va ((cham duc) OR (pham duc)) va hanh tai duc tre.
• Adding a wildcard symbol may retrieve word variants: ((su sach) or (vu sach)) ky nang tai hoi. hieu va ((cham duc) or (pham duc)) va hanh tai duc tre*.