Perhaps you should try some spelling variations:
nang tai » tang tai, sang tai, nang cao
hang tai » hang va, dung tai
qua cam » qua cham, qua cac, qua ca
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
tuc va » thuc va, truc va, tuc xa

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

• Performing a fuzzy search may retrieve terms with similar spellings: su xac ky ((nang tai) or (hang tai)) roi. hieu qua cam tuc va hanh ((vai cua) or (hoi chuc)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky ((nang tai) OR (hang tai)) roi. hieu qua cam tuc va hanh ((vai cua) OR (hoi chuc)) tre.
• Adding a wildcard symbol may retrieve word variants: su xac ky ((nang tai) or (hang tai)) roi. hieu qua cam tuc va hanh ((vai cua) or (hoi chuc)) tre*.