Perhaps you should try some spelling variations:
tru nang » tra nang, tri nang, truc nano
cham tuc » nham thuc, pham thuc, tham thuc
thu cach » thuc cach, thu canh, tu cach
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
tu nang » tu nong, tu nano, tu lang
va hanh » van hanh, va thanh, va danh
va vuai » va vai
va cham » va chat, va tham
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: thu cach ((tu nang) OR (tru nang)) cao hoi. hieu va cham tuc va hanh ((va vua) or (va vuai)) thiet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu cach ((tu nang) OR (tru nang)) cao hoi. hieu va cham tuc va hanh ((va vua) OR (va vuai)) thiet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu cach ((tu nang) OR (tru nang)) cao hoi. hieu va cham tuc va hanh ((va vua) or (va vuai)) thiet".
• Adding a wildcard symbol may retrieve word variants: thu cach ((tu nang) OR (tru nang)) cao hoi. hieu va cham tuc va hanh ((va vua) or (va vuai)) thiet*.