Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh hai, thanh van
dang van » hoang van, hang va
va thanh » gia thanh, ban thanh, va tinh
hieu va » lieu va, hieu qua
cac hoc » cach hoc, cac hop, bac hoc
nang xa » nang x, lang xa, nang ma
dat cua » dai cua, day cua, mat cua
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
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: te sac ky ((nang xa) or (dang van)) hoi. hieu va ((cac hoc) or (bac ha)) va thanh dat cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((nang xa) OR (dang van)) hoi. hieu va ((cac hoc) OR (bac ha)) va thanh dat cua te.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((nang xa) or (dang van)) hoi. hieu va ((cac hoc) or (bac ha)) va thanh dat cua te*.