Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
cam luc » cam xuc, cau luc
sac ky » sai ky
va cam » va cham, va cac, va cao
luc va » duc va, tuc va, loc va
vi cua » vai cua
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu ((sac ky) or (cac ky)) nang cao hoi. hieu va cam luc va thanh ((vi cua) or (di cua)) vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (cac ky)) nang cao hoi. hieu va cam luc va thanh ((vi cua) OR (di cua)) vat.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (cac ky)) nang cao hoi. hieu va cam luc va thanh ((vi cua) or (di cua)) vat*.