Perhaps you should try some spelling variations:
cham truc » cau truc, nham thuc, pham thuc
mai khoi » mai khoa, tai khoa, cac khoi
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, va danh
truc va » thuc va, thuc vat, trung va
hieu ve » hieu va, hieu van
ve cham » va cham, ve chat, vu cham
mai hoi » dai hoi, lai hoi, mai doi
ky tang » ky nang, ky dang, kho tang
sac ky » cac ky, sai ky
di cua » dai cua, de cua, do cua
vu sac » vu sach, vu san, va sac

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

• Performing a fuzzy search may retrieve terms with similar spellings: vu sac ky tang ((mai hoi) or (mai khoi)). hieu ve cham truc va hanh ((di cua) OR (doi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sac ky tang ((mai hoi) OR (mai khoi)). hieu ve cham truc va hanh ((di cua) OR (doi cua)) tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sac ky tang ((mai hoi) or (mai khoi)). hieu ve cham truc va hanh ((di cua) OR (doi cua)) tre*".