Perhaps you should try some spelling variations:
vu khach » vu khanh, vu khac, vay khach
khach tu » khach deu, khanh thu, hanh tu
qua cham » qua hai, qua cac, va cham
cham duc » pham duc, cham soc, pham duy
hanh lai » hanh tai, thanh lap, thanh loi
hanh lam » thanh lap, hanh kem, hanh va
tu nang » tru nang, tu nong, tu nano
cua tre » cuu tre, cua triet, dua tren
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu khach tu nang x hoi. hieu qua cham duc va ((hanh lai) or (hanh lam)) ((cua tre) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu khach tu nang x hoi. hieu qua cham duc va ((hanh lai) OR (hanh lam)) ((cua tre) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: vu khach tu nang x hoi. hieu qua cham duc va ((hanh lai) or (hanh lam)) ((cua tre) or (cua te))*.