Perhaps you should try some spelling variations:
thuat tap » thuat lap, thuat tao, thuat ap
hanh tai » thanh tai, hang tai, han tai
dua tren » dung tren
nang ma » tang ma, sang ma, nang cao
hieu va » lieu va, hieu qua
cao luc » bao luc, cao duc, cao suc
va hanh » van hanh, va thanh, va danh
va cao » va cac, va co, va dao
luc va » duc va, tuc va, loc va
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: thuat tap ky ((nang x) or (nang ma)) hoi. hieu va cao luc va hanh tai ((dua tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thuat tap ky ((nang x) OR (nang ma)) hoi. hieu va cao luc va hanh tai ((dua tren) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: thuat tap ky ((nang x) or (nang ma)) hoi. hieu va cao luc va hanh tai ((dua tren) or (cua te))*.