Perhaps you should try some spelling variations:
loai tren » la tren, thai tren
hieu van » hieu va, thien van, lieu va
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
van hoi » van hoc, van hoe, van loi
van lam » van nam
lam luc » lao luc, lam duoc
luc van » luoc van, luu van, duc van
y lang » o lang, _ lang, tay lang
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 sach y lang ((van hoi) OR (van hoa)). hieu van lam luc van hanh vi ((loai tren) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y lang ((van hoi) OR (van hoa)). hieu van lam luc van hanh vi ((loai tren) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y lang ((van hoi) OR (van hoa)). hieu van lam luc van hanh vi ((loai tren) or (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach y lang ((van hoi) OR (van hoa)). hieu van lam luc van hanh vi ((loai tren) or (cua te))*.