Perhaps you should try some spelling variations:
chau tren » cau tren, chay tren, cu tren
mai khoi » mai khoa, tai khoa, cac khoi
tinh lai » tinh lao, tinh hai, minh lai
nam thuc » nam thuoc, am thuc, nam thu
hieu van » hieu va, thien van, lieu va
ky tang » ky nang, ky dang, kho tang
nam xuc » cam xuc, nam xua, nam duoc
mai hoi » dai hoi, lai hoi, mai doi
va tinh » may tinh
thu cac » tu cac, thu xac, thu cuc

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu cac ky tang ((mai hoi) or (mai khoi)). hieu van ((nam xuc) or (nam thuc)) va tinh lai chau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cac ky tang ((mai hoi) OR (mai khoi)). hieu van ((nam xuc) OR (nam thuc)) va tinh lai chau tren.
• Adding a wildcard symbol may retrieve word variants: thu cac ky tang ((mai hoi) or (mai khoi)). hieu van ((nam xuc) or (nam thuc)) va tinh lai chau tren*.