Perhaps you should try some spelling variations:
ve triet » va trien, su triet
sach thi » sach thu, sach tai, sach thieu
hanh lam » thanh lap, hanh kem, hanh va
thuc van » thuc vat, thuc dan, thuc va
vien cac » vien bach, vien dai, vien da
thi hanh » thi thanh
tuc van » truc van, tuc va, duc van
hanh xa » hanh va, hanh ma, hanh xu
tu sach » thu sach, su sach, te sach
ve cam » ve cham, ve cac, va cam
lam ve » la ve, lam vu, nam ve

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach thi hanh xa hoi. hieu ((ve cam) or (vien cac)) ((tuc van) OR (thuc van)) hanh lam ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach thi hanh xa hoi. hieu ((ve cam) OR (vien cac)) ((tuc van) OR (thuc van)) hanh lam ve triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach thi hanh xa hoi. hieu ((ve cam) or (vien cac)) ((tuc van) OR (thuc van)) hanh lam ve triet".
• Adding a wildcard symbol may retrieve word variants: tu sach thi hanh xa hoi. hieu ((ve cam) or (vien cac)) ((tuc van) OR (thuc van)) hanh lam ve triet*.