Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
ve cham » va cham, ve chat, vu cham
so sinh » so sanh, so tinh, cho sinh
nang ma » tang ma, sang ma, mang may
hieu ve » hieu va, hieu van
sinh y » sinh ly
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: so sinh y ((nang ma) OR (nang cao)) hoi. hieu ve cham truc va hanh ((vi cua) or (di cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sinh y ((nang ma) OR (nang cao)) hoi. hieu ve cham truc va hanh ((vi cua) OR (di cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sinh y ((nang ma) OR (nang cao)) hoi. hieu ve cham truc va hanh ((vi cua) or (di cua)) viet".
• Adding a wildcard symbol may retrieve word variants: so sinh y ((nang ma) OR (nang cao)) hoi. hieu ve cham truc va hanh ((vi cua) or (di cua)) viet*.